Expanding-packing construction



J. W. HARASTA. EXPANDING PACKING CONSTRUCTION. APPLICATION FILED SEPT- 8| I920.

Patented Nov. 15, 1921.

2 SHEETS-SHEET I.

J. W. HAMSTA. EXPANDING PACKING cowsmunnow.

APPLICATION FILED SEPT. 83, I920 mama Nov. 15, 1921.

2 SHEETS-SHEET 1.

"welmi'a yf I and State of or roe enemas, carironnra JOSEPH W. HABASTA,

Manna.-

. Specification.

Aiffilication filed September To all to hom'if, may concern Be it known that l, d osnrir W1 flatware, a citizen of the United States, and residingat Los Angeles, in the county of: Los Angcles California, have invented new and useful Improvements in an Expanding- Packing' Construction, of which the follow ing is a specification.

This invention relates to reciprocating piston pumps, motors, and the like, and pertains particularly to means for expanding the packing of said pistons without dis'as scmbling the cylinder and. piston.

Expanding packing has been provided for pistons, and means whereby the packing may he expanded by adjustment of piston. parts of: special construction. E'iuch devices re quire both the renioval or t e pistons andthe cylinder heads to provide to the pistons. Removal of the cylinder heads, asit is ordinarily performed, results in destruction of the gasket and upon replacementof the head requires insertion of the g shot. As, many bolts are employed to secure the head to the cylinder, inuchtirnc is consruned in such perations. This results in the plac ing the plant out or operationduring the time the packing is being adjusted and fur ther loss of time of the other operatives of the plant.

It is theipriniary object of this invention to provide} a cylinder and piston construc tion, whereby packing may be expanded without removal of the cylinder heads. Another object of the invention is the provision of a piston which may employ any or t. well known type of pachings and means whereby the packing ,may be expanded. WVithout expanding means the packing after slight wear beconies unfit for use and must be discarded. This results in a large waste of material. With devices for expanding the packing, as at present employed, special packing must be used. In addition to'the broader features of this invention there are. certain details of construction, whereby a simple, durable, and easily manipulated structure is obtained. v

These objects together with other objects and corresponding accomplishinents, a re ohtained by means of the embodiment oi. my invention illustrated in the accompanying drawing, in which:

Figure l. is a longitrulinal section through a pump cylinder and piston employing one forrn ot my invention; Fig. 2. is a perspective of Letters Patent.

View of a piston a cover plate 7.

ltatented Now. 1.5, 1921.

a lace. seria s. scares.

anda cylinder barrel shown in section with the head removed; is a section through a cylinder and piston. eniploying; another tori-n of my invention; an Fig. & is a perspective view partially in section of a construction such as shown in Fig. 3 with a cylinder barrel.

Referring more particularly to Figs. 1 and Q, a pump cylinder of the usual construetion is shown. The bar-rel is indicated generally by 5. Secured to the cylinder is a head 6. The head has a hand hole closed by By removal of the cover plate, access to the barrel of the pump and the piston is provided. In Fig. 2 the barrel 5 forms the cylinder proper. otherwise the construction is the same. Mounted in the barrel for reciprocation is a piston having a body. 8 formedwitl" a packing groove in his packing which is' disposed packing 9.

may he the ordinary'square type or sleeve type 0 5 packing. Telescoping; the piston body is a follower 10, a washer 11 being disposed against the packing. A piston rod is tapered adjacent its end and the tapered portion extends into a hole in the body. The end of the rod is reduced in diameter and threaded, the threaded portion extend" ing through a threaded bore of hub 13 of the follower, Firmly securing the piston body in position on the rod is a nut i l. The "follower is adiustnhly secured to the rod by means of the threads, and a lock nut 15 is dispose-don the rod with a lock washer .16 interposed between the nut and the hulo of the follower. The construction -,is such that by turning the follower on the rod, pressure may be placed upon the packing and the latter expanded.

" To expan the piston packing, the cover 7 removed and a socket wrench or other tool. applied to the nut 15 so that it may he loosened and with it the i00 washer. In practice aquarter turn or the nut is sutficient to loosen it. The socket or the wrench can then be applied to the follower at the hub 13 which has flattened sides, and the follower turned to give the expansion desired. In practice a halt turn is sufi'icient. The look Washer 16 and the nut 15 may then be tightened against the hub 13; The cover '2' is again holted to the head. if a gasket is, placed between cover plate and the cylinder head, the destruction or the same will not incur as much expense, as the destruction or the cylinder head gasket. Furthen I adjusted totightly grip the packing. The

more, the number of bolts to be removed is small compared with the number of bolts which it would be necessary to remove for taking down the cylinder head. Thus, time, labor, and material are saved.

eferring more particularly to Figs. 3 and 4, the piston construction is identical with that shown in Figs. 1 and 2.

Referring to F ig. 3, the head 17 is pro- Vided with a pocket 18 in which rests the socket wrench 19. The socket wrench is provided with a stem 20 having a flattened end. i v

This stem extends through a stufling box and follower indicated. generally by 21. The follower of the stufiing box is normally stem.

The construction is such that, when it is desired to expand the packing, the follower on the stufling box is turned to loosen the grip on the packing and permit the wrench to be moved into the barrel and turned. The wrench socketmay then be applied to the nut 15 and the latter loosened. Thereupon, the wrench is forced over the hub 13 and the follower turned soils to properly expand the wrench socket is then withdrawn intothe pocket and. the stutfing box follower tightened.

In theconstruction shown in Fig. 4, the barrel of the pump forms the cylinder, the head 17 being secured directly thereto. However, the head is identical in construction with the head shown in Fig. 3.

It is obvious that I have provided a c0nstruction wherein the packing may be ex panded without disassembling the pump.

Furthermore, special packing is not required combination of labor, and material are saved thereby. Saving of time results What I claim is: 1. In a'device of the class described, the a cylinder, a piston rod, a reciprocating piston therein normally fixed on said rod and having expansible packing, a follower movable longitudinally of the piston body for expanding said packing and disposed so that said rod extends .beyond said follower, a nut and screw device mountfor moving said follower and holding it fixed in adjusted position, a cylinpocket, a socket wrench d er head having a disposed in said pocket and having its stem slid ably and rotatably extended through said head for expanding said paclt in whereby said packing may be expande from the outside of said cylinder.

2. A piston comprising in combination a piston rod having a threaded end, a piston body fixed on'said rod with the threaded end extending therethrough, said piston body being provided. with diameter forming a packing channel, a follower threaded on the extension ofsaid rod and having a hub provided with a wrench hold, said follower telescoping with the reduced portion of said rod and forming therewith an adjustable packing groove, and a lock nut on holding said follower in position.

In witness that I claim the foregoing I a portion of reduced the threaded end of said rod for have hereunto subscribed my name this 31st day of August, 1920.

JOSEPH W. HARASTA. 

